$ query “AS21283” --type=asn → 1 result(s)
AS21283 · A1SI-AS
A1 Slovenija telekomunikacijske storitve d.d.
AS21283 is run by A1 Slovenija telekomunikacijske storitve d.d. and is a mid-size transit provider, based in Slovenia since 2002. The system announces a solid 325 632 IPv4 addresses, including a /15, and supports IPv6. Its primary geographic footprint is in Slovenia.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #7 in Slovenia — Top 10 by reach within country
Basic Information
- Country
- 🇸🇮 Slovenia
- Category
- Internet Service Provider
- Network Role
- Mid-size Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- September 20, 2002
- Last Changed
- March 04, 2026
- Last Seen
- October 23, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 18 / 16
- IPv6 Prefixes (raw / aggregated)
- 3 / 2
- IPv4 Addresses
- 325 632
- Largest IPv4 Prefix
- /15 (131 072 addresses)
- Largest IPv6 Prefix
- /29
- Geolocated Countries
- 🇸🇮 Slovenia (325 632 IPs)
- Prefix Changed
- September 25, 2026
Reputation
- Reputation
- Good — 3 flagged IPs out of 325 632 total (0.00%)
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Peers
- 9 networks exchanging traffic without transit
- Downstream Customers
- 33 downstreams buying transit
- Unclassified
- 1 unclassified BGP neighbor
- Degree
- 45 unique BGP neighbors
- Reach
- 37 networks in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (18 total)
- 46.122.0.0/15 (131 072 addresses (/15 prefix))
- 146.212.0.0/16 (65 536 addresses (/16 prefix))
- 90.157.128.0/17 (32 768 addresses (/17 prefix))
- 92.37.0.0/17 (32 768 addresses (/17 prefix))
- 46.164.0.0/18 (16 384 addresses (/18 prefix))
- 85.10.0.0/19 (8 192 addresses (/19 prefix))
- 212.18.32.0/19 (8 192 addresses (/19 prefix))
- 213.157.224.0/19 (8 192 addresses (/19 prefix))
- 62.84.224.0/20 (4 096 addresses (/20 prefix))
- 80.95.224.0/20 (4 096 addresses (/20 prefix))
- 85.10.32.0/20 (4 096 addresses (/20 prefix))
- 109.239.176.0/20 (4 096 addresses (/20 prefix))
- 94.127.24.0/21 (2 048 addresses (/21 prefix))
- 188.64.24.0/21 (2 048 addresses (/21 prefix))
- 185.28.8.0/22 (1 024 addresses (/22 prefix))
- 185.173.52.0/22 (1 024 addresses (/22 prefix))
IPv6 Prefixes (3 total)
- 2001:15c0::/29
- 2a00:1a20::/29